van der waal

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005391550
Posts: 103
Joined: Thu Jul 25, 2019 12:15 am

van der waal

Postby 005391550 » Tue Oct 29, 2019 12:32 pm

how can we tell which molecules will have a greater dipole-dipole or London force? aka what factors contribute to the strength of dipole-dipole interactions?

DMuth_1J
Posts: 63
Joined: Thu Jul 11, 2019 12:15 am

Re: van der waal

Postby DMuth_1J » Wed Oct 30, 2019 11:35 pm

In most cases, dipole dipole interactions are weaker than London Dispersion Forces as the former uses charges and the latter is the result of temporary dipole moments that occur between molecules.

rachel liu 3k
Posts: 56
Joined: Sat Aug 17, 2019 12:16 am

Re: van der waal

Postby rachel liu 3k » Thu Oct 31, 2019 11:35 am

005391550 wrote:how can we tell which molecules will have a greater dipole-dipole or London force? aka what factors contribute to the strength of dipole-dipole interactions?

Addressing the second part of your question, dipole-dipole interactions increase as the polarity of atoms/molecules increase. Polarity is due to unequal sharing of electrons between atoms within the molecule. Hope that helps!

KBELTRAMI_1E
Posts: 108
Joined: Sat Jul 20, 2019 12:17 am

Re: van der waal

Postby KBELTRAMI_1E » Thu Oct 31, 2019 1:06 pm

are we supposed to know this already???

BeylemZ-1B
Posts: 95
Joined: Thu Jul 25, 2019 12:17 am

Re: van der waal

Postby BeylemZ-1B » Fri Nov 01, 2019 3:03 pm

KBELTRAMI_4I wrote:are we supposed to know this already???


This type of bonding was just touched on in lecture recently, so its ok if youre not extremely familiar with it.
These four types of interactions are all pretty much the same if I am not mistaken:
1. dispersion =
2. induced dipole - induced dipole =
3. London =
4. Van Der Waals


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